std::sqrt

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Defined in header `<cmath>`

float sqrt( float arg );

double sqrt( double arg );

long double sqrt( long double arg );

Computes square root of arg.

arg - floating point value

square root of arg.

Domain error occurs if arg is negative. NAN is returned in that case.

cbrt (C++11)

computes cubic root (

3 \sqrt x

)
(function)

raises a number raised to the given power (

x y

)
(function)